Question 590931
If (-3z+6)/3 + z/5 = 12 then  4z^2+2z+50  is what?
**
 (-3z+6)/3 + z/5 = 12
-z+2 + z/5 = 12
-5z+10 + z = 60
-4z = 50
z=-50/4=-25/2
..
4z^2+2z+50
=4(-25/2)^2+2(-25/2)+50
=4(625/4)-25+50
=625-25+50=650